Improvement in book-backing machines



l. ABMSTBUNGK.

Book-Backing Machine.

Patented Aug. 3,1875.

lllllf NPETERS, Frior-UTHGGRAPHER. wAsHmGTDN, D. C.

UNITED STATES PATENT OEETGE.

JAMES ARMSTRONG, OF CAMBRIDGE, MASSACHUSETTS.

IMPROVEMENT IN BOOK-BACKING MACHINES.

Specification forming part of Letters Patent No. 166.328, dated August3, 1875; application filed May 21, 1875.

To all whom itmag/ concern:

Be it known that I, JAMEs ARMSTRONG, of the city ot Cambridge, Middlesexcounty, Massach usetts, have invented a new and Improved Book-BackingMachine, of which the following is a specitication The invention relatesto that class of machines used in the process of binding books where theseveral signatures which go to make up'the book are placed in theirregular order and sewed together. The required curvature, if any isdesired, is given to the front edges when the rear edges are rolled andcompressed, so as to form the back with projecting edges to furnish asupport for the boards which form the covers, and to strengthen the backby making it solid; and it consists in certain improved means forholding the book or signature while being operated upon, and in anoscillating lever carrying the backingroll, sustained by a swingingfulcrum, together with the mechanism for operating the same, which willbe more fully described hereafter, reference being made to theaccompanying drawings, thrilling part of this specification, in which-Figure l is a plan or top view of the machine, and Fig. 2 is alongitudinal section of the same.

Like letters of reference refer to the same parts.

A is the frame supporting the mechanism, and it may be made ot' anysubstantial inaterial. Bis the drive-wheel on the shaft C. to whichpower may be applied in any convenient manner, as by hand or belts. Onthe other end of this shaft is a cog-wheel, D, which gears with thewheel E on the shaft F. 'The bent arm G is attached to the wheel E by anadadjustable sliding plate, g, so that the motion thereof may becontrolled, the other end being connected with the rocking plate H,which is pivoted to the main frame ath, and forms a swinging fulcrum forthe oscillating lever carrying the backing-roll. On the shaft F is thedouble cam 1 which bears against the rightangled lever J, hinged at itsangle to the rod K, attached to the upright frame L, sliding on andsustained by the arch M, and made adjustable by the thumb-screw N. Tothe short arm of the lever J is attached a latch, O, to

.oscillating lever is attached the spring-plate r, made adjustable bythe thumb-screw r', so that the backing-roll may give a little, toovercome any inequality in the book. U is a table, sliding in lgroovesin the main frame,

and made adjustable by the screw V. To this table is attached thegudgeon W, around which rotates the circular plate X, which may besupported on the friction-bearings Y. The plate X has, at regula-rintervals, open spaces Z, (two being shown in this instance.) In these,and attached to the plate, are movable jaws, between which the books areconfined. The inner ones a are made adjustable by the slots and screws.The outer ones b, being hinged at their lower parts, are operated toclamp the book by the cam-levers c. At regular intervals, agreeing withthe number of open spaces, the plate X is provided with notches, intowhich the spring locking-pin t, or some equivalent device, enters tohold the plate in the proper position for the operation of thebacking-roller.

The operation ot' my machine is as follows: The book is placed betweenthe jaws c b, and securelyv clamped by the cam-lever c, the jaw a beingadjusted to tit the size of the book. The Vframe X is then rotated onthe gudgeon to bring the book under the backing-roller T, when thelocking-pin t enters the notch, as before described. The sliding frame-Uis then adjusted by means of the screws V, so as to bring the center ofthe book under the backing-roll when in the center of the are throughwhich it moves. The machine being set in motion, the bent arm G isadjusted, by means ot' the sliding plate g, to give the rocking fulcrumH a motio`n corresponding to the width of the book, producing aback-and-forth movement of the backing-roll T. At the same time, bymeans of the double cam I and the rightangled lever J and connections,`a double oscillatory movement is given to the lever R, carrying the rollT. Thus it will be seen that the backing-roll has two movements up anddown to one back and forth, the result being that the roll moves backand forth over the edge of the book in an arc of the circle, and thuspressing the book from the circle to the sides, -respectively, insuresthe bending ofthe leaves in the proper direction.

The shape ofthe cam I is such that the pressure of' the roll will be theleast when over the center of' the book, and increase as it moves towardthe sides.

The arm Q is provided with holes, so that the oscillating lever may beadj usted for varying-sized books7 and the arm J, being hung in thesliding frame L, admits of very nice adjustment of the same by means ofthe screw.

By means of the cam-lever P. which may be operated by hand, orotherwise, the backingroll may be raised out of contact with the book,so that the plate X may be rotated to bring the book into positionwithout stopping the machine.

I do not wish to confine myself to the precise mechanism shown anddescribed, for many equivalents could be easily suggested whereby thebook-clamping table might be rotated, and the double oscillating andvibrating motion given to the backing-roll, which are the essentialfeatures of my invention, and which I have found to constitute a verysimple and eEective machine for backing books.

Having now fully described my machine, and set forth its inode ofoperation, what I desire to claim, and secure by Letters Patent in theUnited States, is-

1. The combination, with a book-backing roller, of a rotatingbook-holding plate, substantially as described.

2. The combination, with a book-backing roller, of a rotatingbook-holding plate, having adjustable book-holding jaws Vand theadjustable sliding frame, substantially as de.- scribed.

3. The book-backing roll T, having a double oscillatory and vibratorymovement, by means of mechanism substantially as described.

4. The combination of the oscillatory lever R, carrying the backing-rollT and the rocking fulcrum H, substantially as described.

5. The combination of the cam I, right-angled lever J, pendant Q, andlever R, for producinga double oscillatory movement of the backing-roll,substantially as described.

6. The combination of the lever J, latch O, cam-lever P, pendant Q, withthe lever R, for raising the backing-roller, as and for the purposedescribed.

JAMES ARMSTRONG.

Witnesses:

WM. A. AMEE, BENJ. H. RICHARDSON.

